Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 38)

Chapter 4
Status Displays
4–8
This display presents information that describes the utilization of the
workstation’s RAM.
Figure 4.8
Workstation Memory Status, Display 6
RAM PGMEM LPMEM
BFUSE BLEFT
The top line contains:
RAM Total RAM Memory – Displays the total number of K bytes of
RAM installed.
PGMEM Bytes Remaining For Program Use – This value shows the
amount of RAM available for an A-B VBASIC program. The
value is decreased from its factory default setting by the use of
memory for:
1. Program pseudo-code (i.e. “logic”)
2. Program variables
3. Program pseudo-stack (for procedure returns, etc.)
This value is reset to its factory default when the first record of an A-B
VBASIC program is received (the “>, AA record”). It is decremented as the
program arrives and as it runs. Thus, this value reflects the difference
between the factory default and the maximum used by the current application
(A-B VBASIC program).
LPMEM Least Used Program Memory – This value represents the
program’s peak memory utilization. A value of zero means that at
some point, the program memory was full.
The lower line contains:
BFUSE Bytes For File Usage – This value shows the amount of RAM
available for use in A-B VBASIC files.
If this value ever reaches zero, the effect will be quite serious,
unless the A-B VBASIC program detects this condition.
BLEFT Bytes Remaining For File Use – The amount of RAM available
for file use that has never been used by the current application.
Workstation Memory Status
(Status Display 6)